[Roark66]

I'd imagine how much actual calories that is depends on the size of the potatoes. When potatoes fail, they often do so by producing tiny tubers. The smallest I personally ate were less than an inch in diameter.

Also,people who don't do any farming don't realise how much effort goes into pest/disease control. Especially with potatoes the main pest around here(central Europe) is Colorado Potato Beetle (if that is the correct name for it in English). It is an extremely resilient organism. It very quickly starts tolerating all insecticides that are allowed around here. And between seasons it gets into the ground half meter deep. So unless you want to destroy your soil there is no getting rid of it once it establishes itself somewhere. The only option is to take the crop elsewhere.

It is such a pain in potato growing, during communist times it was used as a propaganda piece. There was (very likely fake) news that US was dropping that beetle from spy planes to ruin the crop. Of course the association of the beetle with one of the US's states didn't help.

Another way to deal with such infestation is to pick it up by hand and lots of people did that back then and now. You can imagine how unpleasant that is. Also you end up with 5l jars full of these bugs...

[amatic]

When I was growing up, in eastern Europe, we had a small potato plot and every few days during the growing season, we would go to the plot, scrape the little red eggs from the leaves, and hand-pick the larva and adult beetles, then crush everything with our feet. I'm guessing this wouldn't scale too well for larger producers, but seemed to be working well for us.

[Eisenstein]

No problem: just find an animal that has no local predator and eats the beetles and introduce it to the ecosystem. What could go wrong?

[ifdefdebug]

Nothing. It will eradicate the potatoe bug and then go extinct for lack of prey.

This is incredible! It takes two HN nerds just 5 minutes to come up with a good plan a group of scientists would have needed months to develop.

[mrmincent]

I’d like to think this is the exact same conversation that gave Australia it’s 2nd favourite purse material, the cane toad.

[EdwardDiego]

And New Zealand it's near-extinct endemic birds, thank to mustelids.

[jeromenerf]

The brought-in-for-some-purpose, escape-to-bush, become-feral, become-pest worked also for cats, dogs, horses ... up-to camels. I am not aware of Australian Feral Elephants but it may exist.

[kuhewa]

It gave Hawaii no less than thirty-four species of insects introduced as attempted biocontrol of an introduced shrub Lantana. Which still grows freely

[jjgreen]

... around here (central Europe) is Colorado Potato Beetle (if that is the correct name for it in English)

Usually just the "Colorado Beetle" in the UK at least. Little bastards.

[Eddy_Viscosity2]

I've mostly them called 'potato bugs'

[fauigerzigerk]

Would it help to switch crops around between plots or would these beetles stay in the ground for years even if they couldn't find any potato plants to feed on?

[wlll]

There’s a general rule in amateur gardening that you rotate the location of your potatoes on something like a 4 year schedule. In wider agriculture you’re looking at “crop rotation”. I don’t know how this affects specific beetles etc.

[bregma]

I've had them come back after at least 10 years. Anywhere within about 100 m of a previously infested area.

[gmerc]

There’s a great sun-plot in ‘the Americans’ exploring that particular angle.